In an Oil Bath Filter, after air passes through the oil bath, what happens next?

• A. Air then flows through a screen to remove entrained oil
• B. It flows directly to the engine
• C. It passes through a cooling coil
• D. It is directed to exhaust

Answer: (A)

Air that has just passed through the oil bath still carries some oil droplets. A screen in the filter assembly acts to separate and remove those entrained oil droplets from the airstream, catching them and letting clean air continue on toward the engine. This step prevents oil from entering the engine while the oil droplets are returned to the oil bath. It isn’t routed through a cooling coil or sent straight to exhaust—the next stage is delivering clean air to the engine.